Question GPU Overclock is being reset with every shut-off. Fix?

[NinjaEule]

I recently overclocked my GPU, got a pretty good overclock, and was happy with it.
However when I shut the PC down and started it again, my die and memory frequencies were back to stock.
I didn't recognize it at first but when I did it happened with every shut-off and restart.
Is there some setting in MSI Afterburner that I need to hit for it to keep my overclock? I thought it gets written to the card bios and should therefore stay active.
The PC came preloaded with some Gainward overclocking tool but I removed that and it still didn't keep my overclock.
I also think the previous owner didn't bother overclocking it and I doubt that the people who built it for him did overclock it as well, so that tool shouldn't have been used anyway.
Does anyone know the potential cause of that and how to fix it?

 

[Ralston18]

Update your post to include full system hardware specs and OS information.

Two immediate thoughts:

1) Reset CMOS per the motherboard's User Guide/Manual.

2) Replace the CMOS battery.

 

[BFG-9000]

I thought it gets written to the card bios and should therefore stay active.

It most definitely does not do that. You have to both configure Afterburner to "Start with Windows" under properties, and also click the Windows Flag to set "Apply these settings on startup."

nVidia driver 466.11 also added automatic overclocking and stress testing but it requires the cloud powered GeForce Experience

Unless you have a card older than Pascal, you can't easily use a card with modded vBIOS values and have it work without the driver giving a code 43. What you can do now that nVidia signature lock has been broken, is flash the unmodified vBIOS from a different card (even different vendor) with different factory clocks.